<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <ul>
            <li v-for="(item,index) in list" :key="item">{item}</li>

        </ul>
        <button @click="btn">走一走</button>
    </div>

</body>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
    const vu = new Vue({
        data: {
            list: ['美女', '程序员', ' 帅哥']

        },
        methods: {
            btn() {

            }

        },

    })
</script>

</html>